Brake connection



Sept. l2, 1933. w. J. M'CDCJNALD BRAKE CONNECTION Filed NOV. 28, 1930TMW/MZ Patented Sept. Y12, 1933.y

UNITEDSTATES Ware vPATE-Nr orFie-E.

1,926,782 BRAKE CONNECTION William J; McDonald, Chicago, Ill.,'assignor, by

mesne assignments, to Pullman Car t Manuv,facturing Corporation, acorporation of Dela- Application November 28, 1930 Serial No. 498,572

4 claims. (o1. 711-17) bar manipulated to provide all of the jaws andthebody of the connection.

This invention contemplates the use of a pair of bars of constant crosssection welded at their respective edges to provide a unitary hollowmember of predetermined lengthand strength, the ends of the bars beingseverally forged to provide connection jaws.

rEhe principal object of the invention is to provide a rugged connectingbar so-designed as to permit the use of commercial rolled bars ofangular or curved cross-section, if desired.

The foregoing and other objects are attained by the mechanismillustrated in the accompanying drawing, in which Figure 1 is a planView or" a preferred embodiment of the invention, with a portion of theconnecting bar at the jaws broken away to show the disposition of thepin openings and the jaw material;

Figure 2 is aside elevational view of the same with the jaw of one oithe bar-sof the connection broken away to expose the inner face of thecompanion jaw on the otherbar;

Figure 3 is a section thru the jaws taken on line 3--3, of Figure 2, andslightly enlarged to show the distribution of the jaw metal;

Figure 4 is a similar section thru the body of the assembled connectingbar taken on line 1 -fl,

angle plates 11 united by welds l2 spaced apart as shown or bycontinuous weld, as desired. The contiguous bar edges 13 combine toformgr'ooves 14 designed to accommodate the welds l2 as best shown inFigures 1, 3, and 4.] To form the jaws l5, the corners or crestsv 16 ofthe angles and adjacent langesl'? are deformed by `forging to provide arelatively iiat web portion 1S having a circumscribing peripheral flangeportion 19 and extruded flange portions 20 dening pin openings 21 toprovide extended bearing areas for the connection pins.V .Wherecommercial rolled angle barsare usedas shown, the corners 16 and lletymetal 22 thereof extend into the jaw area andsupplement the materialentering the jaw to rigid-ify the body portion of the connection yandbasal extremities of said jaws.

The jaws 15 are arranged parallel tothe weakest neutral axes X--X of thesevered bars and take their respective load thrust outside the plane ofsaid axes, whereby suchthrusts are imposed eccentrically to cause saidmembers to be stressed toward each other. By this arrangement the p1essures exerted are balanced and the tendency of the bar assembly tobuckle under .compression is reducedto a minimum.Y With the contiguousflange edges 13 'in extended bearing engagement with each otherasindicated in Figures'l, 3, and 4, the welds V12 function only to preventseparation of the bars between the jaws and to further rigidity theassembly. n the preferred embodiment illustrated in the first fouriigures of the drawing, the web portions 18 of the jawsl are disposedoutwardly of the extruded metal portions 2G along the jaw peripheriesand about the pin openings 2l., and in substantial alinement withportions of the members farthest removed from the Vneutral axis of theassembly.

The jaws 15 may take the form depicted in Y Figure 6 in cases whereadditionalbearing area for the braise lever is deemed necessary. Asshown, the weh portions 18 of the jaws are disposed inwardly of theextruded reinforcing por-4 tions i9 and 20, and in substantial alinementwith the weakest neutral axis X-X of the respective members.

It 'may be desirable at times to substitute curved plates for the angleplate sections of the preferred embodiment. As shown in Figure 5,pressed or rolled bars 23'of semicircular or crescent shape are placedtogether edge to edge to form a tubular column and united by welding asin the case of the angular bars. The ends of the respective bars aremanipulated to form jaws 24 with extruded pin bearing flanges 25 andperipheral stii'ening flanges 26 projecting from either side of the webportions 27.

Although the jaw structures have been described as having theirrespective web portions' inwardly or outwardly of their extruded flangeportions Ait is obvious that the jaw sections may assume a generalE-beam configuration with the several webs positioned midway of theextruded flanges dening the pin openings and jaw peripheries, and alsofunction to transmit the load fno thrusts outside the plane of theweakest neutral axes of the members to stress the bars towards eachother as in the case of the other embodiments.

A connecting bar of the type described may be economically produced fromprepared sections or members fabricated to suit and united byelectrically welding them, preferably in a jig to insure accuratealinement of the pin openings in companion jaws to avoid drilling, andboth seams simultaneously welded in a welding machine, using twoelectrodes, to prevent warping.

What I claim isz- Y l. A hollow brake rod formed from a pair ofcommercial rolled angle bars, said bars having edge to edge engagementand rigidly connected together to form a hollow rod substantiallyrectangular in cross section, the ends of said angle bars being formedinto jaws parallel withthe plane of saidmeeting edges'and each having aVreinforcing flange extendingl about its edge, the

angle portion of each angle bar merging into the jaws at opposite endsof the corresponding bar, bosses on said jaws at each end of said brakerod and having aligned apertures therethrough.

2. A hollow brake rod formed from a pair of commercial rolled anglebars, the thickness of the metal forming the angular portion of each barbeing greater along the bisector of the angle than that of the flangeportion, said bars having edge to edge engagement, the engaging edges ofsaid bars dening a groove at each side of .said brake rod, welds in saidgrooves for connecting said edges together, the ends of` each of saidangle bars being formed into jaws at each end of said brake rod, saidjaws being parallel Vwith the plane of said welds and outwardly of theneutral axes of said angle bars, each of said atportions being vprovidedwith inwardly extending apertured bosses and having an inwardlyextending ilange extending around its edge out- Wardlyof said bosses,the angle portion of each angle bar at each end thereof merging intosaid jaws.

3. A hollow brake rod constructed from a pair of commercial rolled anglebars formed with `jaws at their respective ends and having edge toedgeengagement in the plane of the neutral axis of the rod and betweenthe bights of the jaws, the thickness of the metal forming the angularportion of each bar being greater along the bisector of the angle thanthat of the ange portion, the flanges and corner portions thereof beingmerged to form said jaws in planes parallel to the weakest neutral axesof said bars, said jaws having relatively flat base portions formed withapertured bosses and marginal ange portions, and weld means unitingsaid' bars. Y

4. A fabricated hollow brake rod constructed from a pair of commercialrolled angle bars formed with their respective end portions flat-A tenedand their intermediate portions compleinenting each other to form apolygonal column having sides inclined with respect to the plane of andmerging with, said attened end portions to provide jaws havingvperforated vbosses and marginal flange portions beyond the bight of saidjaws, the thickness of the metal of the angular portion of each baralong the bisector of the angle being greater than the thicknessof theflange portion, and weld means uniting said bars betweensaid bightportions of the jaws.

WILLIAM J. MCDONALD.

